Transcription of Chapter 10: Classification of Microorganisms
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Chapter 10: Classification of Microorganisms
Chapter 10: Classification of Microorganisms2. Methods of Identification1. The Taxonomic Hierarchy1. The Taxonomic HierarchyPhylogenetic Tree of the 3 Domains TaxonomicHierarchy DomainKingdomPhylumClassOrderFamilyGenus Species 8 successive taxaare used to classifyeach species:**species can also contain different strains**Scientific Nomenclature To avoid confusion, every type of organism must be referred to in a consistent current system of nomenclature (naming) has been in use since the 18thcentury: every type of organism is referred by its genusnamefollowed by its specific epithet( , species name)Homo sapiens(H. sapiens)Escherichia coli (E. coli) names are Latin (or Latinized Greek) with the genusbeing a noun and the specific epithet an adjective name should be in italicsand only the genus is capitalizedwhich can also be abbreviated**strain info can be listed after the specific epithet ( , E.)
Use of Dichotomous Keys Series of “yes/no” biochemical tests to ID organism. • tests done in a logical order, each test result indicates next test to be done • collective results of multiple tests create a profile allowing ID of microorganism
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